Paper-cutting machine.



G. BERGER.

PAPER CUTTING MACHINE,

APPLICATION FILED mm. 17, 1012.

1 ,O40,262, Patented Oct. 8, 1912.

(I'll z'da 3627964".

' "fig/5% PH IO-WASHINGTON D UNITED STATES PATENT OFFICE.

GUIIDO BERGER, OF TWO RIVERS, WISCONSIN, ASSIGNOR TO THE HAMILTON MANU-FACTURING COMPANY, OF TWO RIVERS, WISCONSIN, A CORPORATION OF WIS-CONSIN.

PAPER-CUTTING MACHINE.

Specification of Letters Patent.

Patented Oct. 8, 1912.

To all whom it may concern:

Be it known that I, GUIno BERGER, citizen of the United States, residingat Two Rivers, in the county of Manitowoc and State of Wisconsin, haveinvented a certain new and useful Improvement in Paper-Cutting Machines,of which the following is a full, clear, concise, and exact description,reference being had to the accompanying drawings, forming a part of thisspecification.

My invention relates to paper cutting machines and has for its objectthe provision of an improved mounting and holding means or clamp for thecutting stick thereof, whereby said stick may readily be inserted in themachine and may readily be turned to present new surfaces to the cuttingblade or may be removed for replacement, all without displacing theclamp from the machine bed that receives the clamp.

I afford access to the clamp operating means by an operating tool thatmay be passed downwardly into the clamp containing groove formed in thebed to tighten or loosen the stick as desired, while the holding clampis within the groove.

My invention also has for its object the provision of improved means forpreventing longitudinal creepage of the stick.

I will explain my invention more fully? by reference to the accompanyingdrawing showing the preferred embodiment thereof,

but to which embodiment I do not limit myself, and in which drawingFigure 1 is a vertical elevation in cross section of so much of acutting machine as is necessary to an understanding of the invention;Fig. 2 is a perspective view showing elements of my improved clamp inseparated relation, the cutting stick being shown partially by dottedlines in order to reveal some of the parts that would otherwise behidden; and Fig. 3 is a perspective view showing a clamp operating toolin operating position.

Like parts are indicated by similar characters of reference throughoutthe different figures.

It will not be necessary to describe the cutting machine shown in Fig. 1in its entirety as such a machine is well known by those skilled in theart. The paper or sheet supporting bed 1 of the machine is provided witha groove which extends crosswise of the machine and is located in theplane of operation of the cutting blade 2. This groove is coextensive indepth with the depth of the two cutting stick clamping members 3 and iand is of a width which will permit these clamping members and thecutting stick 5 interposed therebetween freely to be received. Theclamping member 3 has an upper corner portion thereof removed so as topermit the cutting stick 5, which is square in cross section, to bereceived therein so as to be substantially flush with the top surface ofthe bed 1. hen the stick 5 is received within the clamping member 3 assnugly as possible, this stick slightly overhangs the clamping member 3as indicated in each of the figures. One longitudinal vertical face ofthe stick is adapted to be clampingly engaged with the correspondingvertical face in the seat for the stick that is provided in theclamping. member 3. The complemental longitudinal vertical face of thecutting stick 5 is adapted to be clampingly engaged by the clampingmember 4 which is preferably in the form of a plate and which isprovided with holes 6 that receive uide pins 7 projecting fromthe'clamping member 3 whereby relative vertical displacement of theclamping members 3 and 4.- is prevented whether said clamping membersare loose or tight. As many bolts 8, forming part of the clampingstructure, as may be desired are carried by and are in threadedengagement with the clamping member 3, the heads or outer ends of thesebolts projecting into substantially vertical recesses 9 that are formedin the clamping member 3, the recesses 9 being located in the plane ofoperation of the bolt working tool 10 (Fig. 3). When the cutting stickis to be inserted or withdrawn, the bolt heads are moved inwardly; thebolt shanks being sufficiently short to prevent them from pressing uponthe cutting stick. Then the bolt heads are approached toward theclamping member 3, there is sufficient play between the clamping members3 and 4 to permit of suflicient separation of these clamping members toallow the cutting stick 5 readily to be removed for replacement or to beturned so as to present a fresh face to the cutting blade 2, theseoperations being feasible without the removal of the clamp from the bedof the machine. When the cutting stick has been replaced or turned thebolts 8 are rotated to move outwardly so as to have their heads or outerends press against the vertical wall of the clamp receiving groove inthe bed 1 that directly faces the bolt heads, whereby the.

clamping member 3 is moved against the cutting stick 5, the cuttingstick is moved against the clamping member 4, and the clamping member 4is pressed against the vertical face of the clamp receiving groove posedbetween the clamp and the machine bed 1.

While the recesses 9 are formed in the clamping member 3,1 do not wishto be limited to this detail of construction, nor do I wish to belimited to the precise form of cutting stick holding clamp illustrated.

The clamp members between which the cutting stick is disposed aredesirably made of steel so as to overcome breakage which was hithertocommon in the body pieces that were hitherto made of wood and which wereweakened by bolts and nuts embedded therein. One of the clampingmembers, say the clamping member 3, has its vertical face which ispressed against the cutting stick provided with a knurled or roughenedsurface as indicated at 11 in Figs. 1 and 2, whereby longitudinalcreepage of the cutting stick is prevented without the objectionablebending over of an end of one of the clamping members, vas was donehitherto.

The advantages of my invention as compared with the prior devices willbe readily appreciated by those skilled in the art and need not be setforth in detail.

While I have herein shown and particularly described the preferredembodiment in threaded engagement with the movable one of the clampmembers and whose outer ends press against a wall of the clamp:receiving groove, the bolt carrying clamp member being substantiallyvertically recessed where the bolts are located to permit of the passageof an operating tool intoengagement with the bolts.

2. A cutting machine having a groove in its material supporting bed andlocated in the plane of operation of the cutting blade;-

a clamp having two members, one being movably supported within saidgroove; :a cutting stick disposed between said clamp members; andclamping bolts carried by and in threaded engagement with the movableone of the clamp members and whose outer ends press against a wallof-the clamp receiving groove, there being spacing where the bolts arelocated to permit oft-he passage of an operating tool into engagementwith the bolts.

In witness whereof, I hereunto subscribe my name this 14th day'ofFebruary A. D.,

GUIDO BERGER. Witnesses FRANK J MOSELER, CHARLES KRAUsE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. G.

